문자열에 특정 하위 문자열의 문자가 포함되어 있는지 확인하는 방법

저는 코딩 부트 캠프를하고 있으며 우리의 목표는 사용자가 어떤 유형의 문자 (소문자, 대문자, 숫자 및 특수 문자)와 길이를 선택하고 임의의 보안 암호를 제공하는 암호 생성기를 설정하는 것입니다.

생성 된 암호 에 사용자가 선택한 각 문자 를 포함 해야 한다는 할당의 중요한 부분을 제외하고는이 모든 측면이 작동하도록 할 수 있습니다. 현재 무작위로 잡기 때문에 4 가지 기준을 모두 선택하면 모두 표시되는 것이 항상 보장되는 것은 아닙니다. 어떻게 확인할 수 있습니까?

const lowCaseArr = "abcdefghijklmnopqrstuvwxyz";
const upCaseArr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const numeralArr = "1234567890";
const specialArr = "!@#$%^&*";

function getLength() {
    while (true) {
        var userLength = parseInt(prompt("How many numbers, between 8 and 128, would you like to use? (Enter 0 to cancel)"));
        if (userLength == 0) {
            return 0;
        } else if (userLength > 128 || userLength < 8) {
            alert("You must enter a number between 8-128.");
        } else if (userLength <= 128 && userLength >= 8) {
            alert("Great! Your have selected a password with " + userLength + " characters.");
            return userLength;
        }
    } 
}

function randChar(passwordCharacters) {
    return passwordCharacters.charAt(Math.floor(Math.random() * passwordCharacters.length));
}

function makePassword(userLength, passwordCharacters) { 
    var securePassword = "";
    for (i = 0; i < userLength; i++) {    
        securePassword += randChar(passwordCharacters);
    }
    return securePassword;
}

function generatePassword() {
    var userLength = getLength();
    if (userLength == 0) {
        return "User Cancelled Request";
    }


    var passwordCharacters = "";
    var askLowerCase = confirm("Would you like to include lower case characters? (a, b, c)");
    if (askLowerCase !== true) {
        alert("Got it. No lower case characters will be included.");
    } else {
        alert("Great! Your password will include lower case characters!");
        passwordCharacters += lowCaseArr;
    }

    var askUpperCase = confirm("Would you like to include upper case characters? (A, B, C)");
    if (askUpperCase !== true) {
        alert("Got it. No upper case characters will be included.");
    } else {
        alert("Great! Your password will include upper case characters!");
        passwordCharacters += upCaseArr;
    }

    var askNumerals = confirm("Would you like to include numeral characters? (1, 2, 3)");
    if (askNumerals !== true) {
        alert("Got it. No numeral characters will be included.");
    } else {
        alert("Great! Your password will include numeral characters!");
        passwordCharacters += numeralArr;
    }

    var askSpecial = confirm("Would you like to include special characters? (~, !, @)");
    if (askSpecial !== true) {
        alert("Got it. No special characters will be included.");
    } else {
        alert("Great! Your password will include special characters!");
        passwordCharacters += specialArr;
    }    

    var basePassword = makePassword(userLength, passwordCharacters);

    var securePassword = validateOptions(basePassword, askLowerCase, askUpperCase, askNumerals, askSpecial);
    return securePassword;

}

var generateBtn = document.querySelector("#generate");

function writePassword() {
    var password = generatePassword();
    var passwordText = document.querySelector("#password");

    passwordText.value = password;
}

generateBtn.addEventListener("click", writePassword);

내 생각은 암호를 확인하는 기능을 만드는 것입니다. 여기에 가장 좋은 논리가 무엇인지 잘 모르겠습니다.

function validateOptions(basePassword, askLowerCase, askUpperCase, askNumerals, askSpecial) {

    var securePassword = basePassword;

    // while (missing requirements) {
    // Validate that all selected characters have been included

    //  if securePassword does not contain lowercase, 
    //      then replace a random char in string with lowercase character
    //  if securePassword does not contain uppercase,
    //      then replace a random char in string with uppercase character
    //  if securePassword does not contain numbers,
    //      then replace a random char in string with numeral character
    //  if securePassword does not contain special characters,
    //      then replace a random char in string with a special character
    //  }
    
    return securePassword;
}